Igniter.



No. 891,552. PATENTED JiINE 23, 1908.

0. B. KING.

IGNITER, APPLICATION FILED JUNE 9' 1906.

- CHAHLES-B lf/NG:

i q -7 BY TH Iva-nu FITEIS 50.. WASH-INGTO.;, n. c.

STATES PATENT OFFICE.-

CHARLES B. KING, OF DETROIT, MICHIGAN, ASSIGNOR TO NORTHERNMANUFACTURING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

IGNITER.

Specification of Letters Patent.

Patented June 23, 1908.

To all whom it may concern:

Be it known that I, CHARLES B. KING, a citizen of the United States ofAmerica, residing at Detroit, in the county of Wayne and State ofMichigan, have invented certain new and useful Improvements in Igniters,of which the following is a specification, reference being had thereinto the accompanying drawings.

The mvention relates to igniters particularly designed for use onexplosion engines, and consists in the novel construction as hereinafterset forth.

In the drawings, my improvement is illustrated in sectional elevation.

It is one of the objects of the invention to protect the electrodes ofthe igniter from being fouled with soot from an explosion; further toprotect them from the intense heat, and also to insure the presence ofexplosive mixture in the spark cap whenever the igniter is o erated.

It is a so an object to provide means for causing a more rapid ignitionof the entire explosive charge from the electric spark, and to providemeans for priming where necessary.

A is a spark plug of any suitable construction, which is provided withseparated electrodes B and C.

D is a casing having a threaded nipple E, with which the spark plugengages, and also a nipple F for engaging a threaded aperture in theengine casing. Thus, when the parts are in position, the electrodes Band C are removed from the engine cylinder but are in contact with theexplosive mixture in the casing D, which is in constant communicationwith the cylinder.

With the device thus far described, when the explosive charge iscompressed within the engine cylinder, a portion of the mixture will beforced into the casing D compressing any air or gas remaining from aprevious explosion. If, however, the electrodes were located at the endof the pocket formed by the casin D, the air or products from a previousexp losion trapped in said pocket might prevent access of a fresh chargeto the spark cap. I have, therefore avoided danger of this by extendingthe casing D beyond the position of the electrodes to form the pocket orchamber F, this being of sufficient capacity to receive all of the spentgas when reduced in volume by compression.

In addition to providing the pocket F, the extension of the casing D isused for connecting a riming cup G. This may be of any suitab econstruction, provided with a valve H, by which a quantity of liquidhydrocarbon may be introduced into the casing for the purpose ofpriming.

In operation, the explosive charge, when compressed, will always enterthe casing D as far at least as the spark cap. When ignited, the chargewithin the casing D will be projected by the force of the explosion intothe gas within the cylinder, and thus will more rapidly ignite theentire charge, than where the'spark cap is located within the cylinder.

It will be observed that the spark plug is entirely outside of theengine case, and thus is protected from the intense heat of theexplosion; also the relatively large amount of radiating surface on thecasing D, in comparison with the volume of the charge which it contains,will rapidly dissipate the heat from the explosion.

The casing D is preferably formed as shown with the inclined bottom, soas to provide drainage from the priming cup G to the nipple F. This willfacilitate the introduction of oil into the cylinder. By reason of thefact that the nipple E, to which the spark plug is attached, extendsupward; said plug is arranged in vertical position, with the electrodesprojecting downward and out of the path of the oil introduced from thepriming cup. This prevents danger of short circuiting when priming.

What I claim as my invention is:

1. An igniter comprising a casing having a nipple at one end fordetachably en aging the engine cylinder and two upward y extendingnipples, a priming cup engaging the outer one of said upwardly extendingnipples and a spark plug engaging the intermediate nipple.

2. An igniter comprising a casin having two upwardly extending nipplesan a laterally extending nipple for engaging the engine cylinder, saidcasing having an inclined bottom from the outer of said upwardlyextending nipples to the laterally extending nipple, a priming cupengaging the outer one of said upwardly extending nipples and a sparkplug engaging the other upwardly extending nipp e.

In testimony whereof I afiix my signature in presence of two witnesses.

CHARLES B. KING.

Witnesses:

JAMES P. BARRY, NELLIE KINsELLA.

